We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. Mark Bost/WUSA

We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. Mark Bost/WUSA

We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. Mark Bost/WUSA

We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. Mark Bost/WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Firefighters battled a three-alarm fire in Gaithersburg on Tuesday morning.
Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSZA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA

Sky 9 flew over the scene at 40 Upper Rock Circle. Video showed heavy fire through the roof of a building.
Montgomery County fire officials tell us there was a roof collapse.
We're told the four-story building was not occupied. Montgomery County fire spokesperson Pete Piringer tweeted that the apartment complex is the Gables Upper Rock Apartments, and the building is under construction.
There are 200 firefighters at the scene and a number of trucks, engines and other equipment. WUSA